/usr/lib/minetest/minetestserver:6:fatal_error_fn:Server::step:dedicated_server_loop:run_dedicated_server:main

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding minetest. This problem was most recently seen with package version 0.4.13+repack-1build1, the problem page at https://errors.ubuntu.com/problem/c0cc9027c1e127c3f037bb0bbd494c9ed9b6fe66 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.